/Engine/Source/Developer/AnimationDataController/Public/AnimDataController.h
Removes all attributes for the specified bone name, if any. Broadcasts a EAnimDataModelNotifyType::AttributeRemoved notify for each removed attribute.
Total number of removes attributes
virtual int32 RemoveAllAttributesForBone ( const [FName](API\Runtime\Core\UObject\FName) & BoneName, bool bShouldTransact )